Docker. Failed to establish a new connection: [Errno 111] Connection refused'
app1 is missing the port, you should add it:
app.run(debug=True, host='0.0.0.0', port=5000)when calling to app1 from app2 you should use its host instead of
0.0.0.0:r = requests.post('http://web:5000/users/', data=data)